Tool holder and driver.



C. G. OLSON.

TOOL HOLDER AND DRIVER.

APPLICATION FILED MAIL 12. 1911.

m 1 4., Patented. July 10, 1917.

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CARL Gr. OLSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO ILLINOIS TOOL WORKS, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TOOL HOLDER AND DRIVER.

Specification of Letters Patent.

To all whom it may concern:

Be it known that I, CARL G. OLSON, a citizen of the United States, residing at Chicago, in the county of Cook and State of a Illinois, have invented a certain new and useful Tool Holder and Driver, of which the following is a specification.

My invention relates to spindles for use in various machines or machine tools such as lathes, milling machines, woodworking machines, and others. My device is especially adapted for high speed work, and in its preferred form, has a cylindrical housing of .standard size, thus enabling the device as a whole to be mounted in the machine. The spindle has a taper mouth in which grinding and various cutting tools may be inserted, thus rendering the device universal in the sense of being applicable in a great many different situations and for a great many different specific purposes. The device constitutes both a holding and a driving means and may therefore be regarded as a combination tool holder and driver. The object of the invention is to produce a simple and efficient device having the above men tioned characteristics. Among other things,

it is my purpose to provide a device having simple and efficient bearings for the rotating $0 part; a spindle and pulley which may be held assembled by the same element which holds the chuck or tool in place; and ethcient oiling means which will keep the parts lubricated and require very little attention. Another object is to provide simple and sure acting means for holding the bearing bushings in place and the other elements assembled therewith. These and other contributory objects will become more readily understood from the following description and claims:

The objects are accomplished by the mechanism illustrated in the accompanying drawings, in which:

Figure 1 is an axial section of the assembled device.

Fig. 2 is a transverse section on the line 22, Fig? 1, looking in the direction of the arrows.

F ig. 3 is a transverse section on the line 33, Fig.1, looking in the direction of the arrows.

Fig. 4 is a side view of the assembled devlce.

Fig. 5 is a perspective view of the split taper bushing.

Similar numerals refer to similar parts throughout the several views.

The housing 1 is cylindrical and is of reduced diameter at each end, at which points 1t is externally threaded to take the caps 2 and 3 and the lock nuts 4.- and 5. The housmg; is of some standard diameter, so that it may be introduced and held in various standard machines. Near its central portion it has an Oll chamber .6 into which a suitable lubricant may be introduced through a screw plug 7. At the back end of the housing there is formed a taper bearin 9 which receives a bushing 10. This bushing is split as shown in Fig. 5 so as to be adjustable for wear. This and the front bushing 11 are made of special bearing material and form journals for the rotating spindle 12. Bushing 10 is held in position by cap 2, previously mentioned. This cap screws over the threaded back end of the housing and has an inwardly turned annular shoulder 14, which forms an end thrust hearing by which bushing 10 mav be adjustably forced into its taper seat in the housing. Between cap 2 and lock nut 4 is a thin washer 15 having a tongue 16 which fits into a groove 17 extending longitudinally in the threaded back end of the housing. The arrangement is clearly shown in Fig. 2 as well as Fig. 1.

The front bushing 11 bears at the inner end against an inwardly extending annular flange 19. The front end of the bushing is tapered to form a seat for the taper collar 20 formed upon the front end of spindle 12. The front surface of this collar is in a plane transverse to the axis of the spindle and thus forms an abutment or shoulder for a ring 22 which acts as a thrust bearing. By preference, this ring is prevented from turning by two pins 23 which extend into the annular shoulder 24 formed upon the inside of cap 3. The mouth of the spindle projects beyond the shoulder '20 and is conically tapered to receive the shank 25 of a chuck or tool. It is assumed that the chucks or tools intended to be used with my device shall have conically tapered shanks each having an interiorly threaded socket 26 for receiving the threaded end of the holding rod 27. At the back end rod 27 has an annular shoulder 28 .which bears against the drive pulley 29.

Said pulley has a conical bore which fits over the conically tapered end 30 of the spindle. By reference to Fig. 1 it will be seen that when the holding rod 27 is tightened, it both Patented July to, 1917.

draws the shank 25 firmly to a seat in the tapered mouth of the spindle and draws the pulley 29 firmly to a seat on the conical tapered portion 30 at the back end of the spindle. Thus the parts are held assembled through the medium of a single holding element. Cap 3 like cap 2 is locked in position by means of a lock nut 5 assisted by'the washer 32 which, like the washer 15, has a tongue 33 fitting in the longitudinal groove 'and inserts its conically tapered shank into the correspondingly tapered mouth of the spindle; He then inserts the holding rod 27 and screws it into the socket 26 in said shank. As previously stated, thisserves both to hold the shank in position and to hold the pulley 29 firmly secured to the back projecting end of the spindle. The spindle may now be rotated at high speed through the driving pulley 29 and the parts will maintain their position with security. The chamber 6, being filled with lubricant. keeps the bearings well oiled for a long period of time without any particular inspection. When the bushing 10 wears, the wear may be taken up by readjusting the cap 2.

By looking at Fig. l of the drawings, it will be seen that the entire device, practically speaking, presents the appearance of a small, unitary cylinder made up of a plurality of component parts, but nevertheless, having the shape and appearance of a single unitary structure.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A portable, unitary tool holder and driver comprising a cylindrical housing adapted to be fastened in a lathe or similar machine, a spindle journaled in said housing. said spindle having a longitudinal bore and being conically chambered at the front end for receiving the shank of a chuck or tool. and a holding rod passing longitudinally through the spindle and screwing into the end of the shank for holding the same tightly seated in the mouth of the spindle.

2. A standardized portable tool adapted to be fastened in a lathe or similar machine,

the conically tapered end of a chuck or tool, I

a pulley fastened on said spindle beyond the back end of the housing, and a holding rod bearing against the pulley to hold it upon the spindle, said rod passing through the spindle and screwing into the shank of the chuck or tool for holding it firmly seated in the spindle.

' 3. In a device of the class described, the combination of a housing, a spindle journale'd therein, said spindle being longitudinally chambered and having a flaring mouth at the front end and a conical exterior at the back end, the spindle projecting beyond the back end of the housing, a pulley having a conical bore fitting the conical back end of the spindle, and a holding rod having a shoulder bearing against the pulley for holding it fast upon the spindle, said rod screwing into the end of the shank of a chuck or tool for holding said shank firmly seated in the flaring mouth at the front end of. the spindle.

4. In a portable tool holder and driver, a cylindrical housing having at one end a conically tapered bearing, a conically tapered split bushing fitting into said bearing and a cap screwing over the adjacent end 0 the housing for forcing said bushing into said taper bearing, a spindle rotatably mounted in said bushing, means for driving said spindle, and means for holdin the shank of a chuck or tool fast to said spindle.

5. In a portable tool holder and driver,

a cylindrical housing which is longitudinally chambered and has an inwardly projecting flange near one end, a bushing within the housing hearing at its inner end against said flange, said bushing having a ta ered mouth, a spindle passing through said bushing and having a tapered shoulder bearing against the tapered mouth of said bushing, the front end of said shoulder being plane and transverse to the axis of the spindle, a

thrust bearing screwing onto the end of the housing, and engaging the plane surface of said shoulder for holding the spindle seated upon the bushing, means for driving said spindle, and means for holding the shank of a chuck or tool in said spindle.

In witness whereof, I have hereunto subscribed my name.

CARL G. OLSON. 

